Question

List any three observations that determined that a chemical reaction has taken place. Also list the three informations that cannot be obtained about a chemical reaction.

Answer 1

The following observations will takes place during the chemical reaction.

   Change in physical state, temperature, colour of products, and also evolution of some gases.

   A chemical reaction is a reaction in which a product that has chemical properties that differ from the original reactants is produced.

   The chemical reactions occur in different ways combination, separation, or rearrangement of atoms.

   Although the reaction causes changes at the atomic level, physical changes in the system can sometimes be observed indicating a chemical change is underway.

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